android zbar使用

一、配置ndk
这就不说了，网上一大堆，随便一搜就搞定了

二、下载zbar源码
1、下载Zbar、libiconv源码
到ZBar的Github托管主页上下载 https://github.com/ZBar/ZBar
下载libiconv，http://www.gnu.org/software/libiconv/#downloading
2、编译libiconv
编译libiconv需要在linux环境下，（libiconv已编译，无需重复此步骤）
3、编译zbar
解压zbar，
- 在项目中app/src/main/目录下新建jni文件夹
- 把编译好的libiconv放入我们项目的jni文件夹。
- 解压刚才下载好的Zbar，首先把Zbar的头文件所在文件夹zbar/include放入我们项目的jni文件夹下。
- 把Zbar对java的接口文件zbarjni.c放入我们项目的jni文件夹，zbrjni.c在zbar/java文件夹下。
- 把Zbar的核心库文件所在的文件夹zbar/zbar放到我们项目的jni文件夹下。
- 把Zbar编译时需要的Android.mk、Applicaiton.mk、config.h从zbar\android\jni下拷贝到我们项目的jni文件夹下
android zbar使用_第1张图片

根据zbar目录结构，对Android.mk进行改动，主要改的是文件夹路径和文件路径，修改后的Android.mk的内容如下：

MY_LOCAL_PATH := $(call my-dir)# libiconvinclude $(CLEAR_VARS)LOCAL_PATH := $(MY_LOCAL_PATH)LOCAL_MODULE := libiconvLOCAL_CFLAGS := \    -Wno-multichar \    -D_ANDROID \    -DLIBDIR="c" \    -DBUILDING_LIBICONV \    -DBUILDING_LIBCHARSET \    -DIN_LIBRARYLOCAL_SRC_FILES := \    libiconv-1.15/lib/iconv.c \    libiconv-1.15/libcharset/lib/localcharset.c \    libiconv-1.15/lib/relocatable.cLOCAL_C_INCLUDES := \    $(LOCAL_PATH)/libiconv-1.15/include \    $(LOCAL_PATH)/libiconv-1.15/libcharset \    $(LOCAL_PATH)/libiconv-1.15/libcharset/includeinclude $(BUILD_SHARED_LIBRARY)LOCAL_LDLIBS := -llog -lcharset# libzbarjniinclude $(CLEAR_VARS)LOCAL_PATH := $(MY_LOCAL_PATH)LOCAL_MODULE := zbarLOCAL_SRC_FILES := zbarjni.c \         zbar/img_scanner.c \         zbar/decoder.c \         zbar/image.c \         zbar/symbol.c \         zbar/convert.c \         zbar/config.c \         zbar/scanner.c \         zbar/error.c \         zbar/refcnt.c \         zbar/video.c \         zbar/video/null.c \         zbar/decoder/code128.c \         zbar/decoder/code39.c \         zbar/decoder/code93.c \         zbar/decoder/codabar.c \         zbar/decoder/databar.c \         zbar/decoder/ean.c \         zbar/decoder/i25.c \         zbar/decoder/qr_finder.c \         zbar/qrcode/bch15_5.c \         zbar/qrcode/binarize.c \         zbar/qrcode/isaac.c \         zbar/qrcode/qrdec.c \         zbar/qrcode/qrdectxt.c \         zbar/qrcode/rs.c \         zbar/qrcode/util.cLOCAL_C_INCLUDES := \                    $(LOCAL_PATH)/include \                    $(LOCAL_PATH)/zbar \                    $(LOCAL_PATH)/libiconv-1.15/includeLOCAL_SHARED_LIBRARIES := libiconvinclude $(BUILD_SHARED_LIBRARY)

然后在Application.mk中填写你要编译的平台：

APP_ABI := armeabi armeabi-v7a x86APP_PLATFORM := android-14

在app目录下build.gradle中添加

android {    ……    sourceSets {        main {            jni.srcDirs = []        }    }    repositories {        flatDir {            dirs 'libs'        }    }}

此时我们用命令行进入项目的jni文件夹的父目录，然后此时执行ndk-build进行编译。
android zbar使用_第2张图片

编译运行成功后生成文件：
android zbar使用_第3张图片

三、运行
在app/src/main/目录下新建文件夹jniLibs，将libs中的文件拷贝到jniLibs中，
然后将解压后的zbar/java/net文件夹复制到app/src/main/java/下：
android zbar使用_第4张图片

将解压后zbar/android/examples/CameraTest/src/net/sourceforge/zbar/android/CameraTest/下的CameraPreview.java类文件拷贝到主工程app/src/main/java/工程包名目录下：
android zbar使用_第5张图片

将解压后zbar/android/examples/CameraTest/res/layout /下的main.xml文件拷贝到主工程中res/layout下

在MainActivity中调用.so库和native方法：

public class MainActivity extends AppCompatActivity {    private Camera mCamera;    private CameraPreview mPreview;    private Handler autoFocusHandler;    TextView scanText;    Button scanButton;    ImageScanner scanner;    private boolean barcodeScanned = false;    private boolean previewing = true;    static {        System.loadLibrary("iconv");        System.loadLibrary("zbar");    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);           setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);        /* Instance barcode scanner */        scanner = new ImageScanner();        scanner.setConfig(0, Config.X_DENSITY, 3);        scanner.setConfig(0, Config.Y_DENSITY, 3);        autoFocusHandler = new Handler();        mCamera = getCameraInstance();          mPreview = new CameraPreview(this, mCamera, previewCb, autoFocusCB);        FrameLayout preview = (FrameLayout)findViewById(R.id.cameraPreview);        preview.addView(mPreview);        scanText = (TextView)findViewById(R.id.scanText);        scanButton = (Button)findViewById(R.id.ScanButton);        scanButton.setOnClickListener(new OnClickListener() {            public void onClick(View v) {                if (barcodeScanned) {                    barcodeScanned = false;                    scanText.setText("Scanning...");                    mCamera.setPreviewCallback(previewCb);                    mCamera.startPreview();                    previewing = true;                    mCamera.autoFocus(autoFocusCB);                }            }        });    }    public void onPause() {        super.onPause();        releaseCamera();    }    /** A safe way to get an instance of the Camera object. */    public static Camera getCameraInstance(){        Camera c = null;        try {            c = Camera.open();        } catch (Exception e){        }        return c;    }    private void releaseCamera() {        if (mCamera != null) {            previewing = false;            mCamera.setPreviewCallback(null);            mCamera.release();            mCamera = null;        }    }    private Runnable doAutoFocus = new Runnable() {        public void run() {            if (previewing)                mCamera.autoFocus(autoFocusCB);        }    };    PreviewCallback previewCb = new PreviewCallback() {        public void onPreviewFrame(byte[] data, Camera camera) {            Camera.Parameters parameters = camera.getParameters();            Size size = parameters.getPreviewSize();            Image barcode = new Image(size.width, size.height, "Y800");            barcode.setData(data);            String qrCodeString = null;            ImageScanner mImageScanner = new ImageScanner();            int result = mImageScanner.scanImage(barcode);            if (result != 0) {                SymbolSet symSet = mImageScanner.getResults();                for (Symbol sym : symSet)                    qrCodeString = sym.getData();            }            if (!TextUtils.isEmpty(qrCodeString)) {                // 成功识别二维码，qrCodeString就是数据。                  try {                    String encodeResust = new String(qrCodeString.getBytes("GB2312"), "utf-8");                    Toast.makeText(MainActivity.this, encodeResust, Toast.LENGTH_SHORT).show();                } catch (UnsupportedEncodingException e) {                    e.printStackTrace();                }            }        }    };    // Mimic continuous auto-focusing    AutoFocusCallback autoFocusCB = new AutoFocusCallback() {        public void onAutoFocus(boolean success, Camera camera) {            autoFocusHandler.postDelayed(doAutoFocus, 1000);        }    };}

Demo地址：https://github.com/LeeVanie/ZbarDemo

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